<template>
<div>数字：{{num}}</div>
<button @click="add">+1</button>
<button @click="dec">-1</button>
</template>
<script>
export default{
    data(){
        return{
            num:1,
        }
    },
    methods:{
        add(){
            this.num++
        },
        dec(){
            this.num--
        },
    },

}
</script>
<style>

</style>